CN110340528A - The welding method of airborne pencil rocket shell - Google Patents
The welding method of airborne pencil rocket shell Download PDFInfo
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- CN110340528A CN110340528A CN201910641507.8A CN201910641507A CN110340528A CN 110340528 A CN110340528 A CN 110340528A CN 201910641507 A CN201910641507 A CN 201910641507A CN 110340528 A CN110340528 A CN 110340528A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
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- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Laser Beam Processing (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of welding methods of airborne pencil rocket shell, the airborne pencil rocket diameter of the housing is less than 200mm, material is 30CrMnSiA Hi-Stren steel, airborne pencil rocket shell includes front head shell and cylinder is followed by casing, and front head shell and cylinder are followed by processing-left section of the butt welding sample and right section of butt welding sample of processing-quenching and tempering-assembly, tack welding-shell prefabricated component and welded specimen prefabricated component butt welding-weld radiographic inspection, repair welding, again radiographic inspection and stress relief annealing of casing.Using welding after housing part quenching+tempering, weld strength loss is small, can achieve 95~100% (base material matrix 1080~1240MPa of tensile strength, 1026~1180MPa of weld joint samples tensile strength) of base material matrix strength；Welding seam toughness is good, 40 ° of flawlesses of bending angle.
Description
Technical field
The present invention relates to grain chamber case weld technical fields, and in particular to a kind of airborne pencil rocket shell
Welding method.
Background technique
It is airborne using solid-rocket as defence product, the ring of power with the fast development of the technologies such as unmanned plane, helicopter
Border detection products application is more and more, its main feature is that requested number is more, high in machining efficiency, manufacturing cost is low.
Medium-and-large-sized solid propellant rocket as strategic missile, tactical missile, military-civil satellite launch power device,
The value of the product of its grain chamber shell is high, and the process-cycle is long.Its traditional butt welding adjusts circle using brass inner support tool
Stretching welding, after brass inner support tool is taken out after welding, operator gets into the polishing welding seams back side in shell, this welding method efficiency
It is lower, the period is longer, higher cost.Using the butt welding method of traditional medium-and-large-sized grain chamber shell, it is difficult to
Meet more, high in machining efficiency, manufacturing cost the is low new demand of airborne pencil rocket shell count.
The pencil rocket shell that diameter is less than 260mm, material is 30CrMnSiA Hi-Stren steel, it is desirable that I grades of docking
Weld seam, welding point tensile strength cannot be less than 90% (σ b weldering >=972MPa) of base material matrix minimum tensile strength, and connector is curved
Bent angle α >=40 °, back of weld are not allow for being recessed, and weld reinforcement is not greater than 0.3mm, and assembly, welding, disassembly, reconditioning are total
Time is not greater than 20 minutes, cannot be met the requirements using traditional butt welding method.
The shortcomings that traditional storepipe, which welds, uses argon arc welding method, this welding method is welding effect
Rate is lower, welding deformation is larger.If improving processing efficiency, part is welded after quenching+tempering, weld strength loss
Greatly, generally less than the 70~80% of matrix strength, are not able to satisfy the performance requirement not less than matrix strength 90%.In addition, shell
After welding carry out quenching+tempering heat treatment, process flow is long, need by welding, flaw detection, annealing, quenching, tempering, school shape,
The processes such as machining are not suitable with the requirement of pencil rocket shell batch production.
Summary of the invention
The purpose of the present invention is to the deficiency of above-mentioned technology, it is airborne to provide that a kind of precision is high, loss of strength is low
The welding method of pencil rocket shell.
To achieve the above object, the welding method of the airborne pencil rocket shell designed by the present invention, it is described airborne small-sized
Storepipe diameter is less than 200mm, material is 30CrMnSiA Hi-Stren steel, and airborne pencil rocket shell includes preceding envelope
Casing and cylinder are followed by casing, and the welding method includes the following steps:
1) front head shell and cylinder are followed by the processing of casing
By the roughing of cylindrical body raw material at front head shell, the front end of front head shell is equipped with smart car technique collet, preceding
The rear end of end socket shell is equipped with the preceding cylindrical section that casing butt welding is followed by with cylinder, and the rear end face of preceding cylindrical section is preceding butt end
Face；
Round tube raw material roughing is followed by casing at cylinder, wherein the front end that cylinder is followed by casing is and preceding circle
The rear cylindrical section of cylinder section butt welding；
2) left section and right section of butt welding sample of butt welding sample of processing
By the roughing of round tube raw material at left section and right section of butt welding sample of butt welding sample, wherein butt welding sample is left
The wall thickness and size of section are identical as preceding cylindrical section；Similarly, right section of butt welding sample of wall thickness and size and cylinder are followed by casing
It is identical；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, to the docking in step 2)
Weld left section of sample and right section of progress quenching and tempering of butt welding sample；
4) assembly, tack welding
It will be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, trial assembly is qualified
Opening circumferential on the ring in positioning sleeve clamp carries out laser positioning weldering and obtains shell prefabricated component afterwards, similarly, by step 3)
In left section of butt welding sample and right section of butt welding sample cleaning after is fitted into positioning sleeve clamp, in positioning sleeve after trial assembly qualification
Circumferential opening carries out laser positioning weldering and obtains welded specimen prefabricated component on the ring of fixture；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
6) weld radiographic inspection, repair welding, again radiographic inspection and stress relief annealing
Shell and welded specimen weld seam detect a flaw after welding, method for laser welding pair is then protected using argon gas
It is qualified that shell butt weld fault location carries out repair welding, and carries out radiographic inspection to repair welding weld seam；And exist to shell and welded specimen
Stress relief annealing is carried out after welding.
Further, in the step 1), preceding cylinder segment length L1 is 5~10mm.
Further, in the step 1), the preceding docking end face of preceding cylindrical section and the axis verticality of front head shell are missed
Difference is not more than 0.1mm；Docking end face and cylinder are followed by the axis verticality error of casing no more than 0.1mm afterwards.
Further, in the step 1), preceding cylindrical section, rear cylindrical section outer diameter tolerance are D1 (+0.03, -0.03), wall thickness
Tolerance is t (+0.05,0).
Further, in the step 1), preceding cylindrical section inside and outside wall and end face intersection edges are paracone side, in rear cylindrical section
Outer wall and end face intersection edges are metacone side.
Further, in the step 3), hardening heat is 890~910 DEG C, and the cool time is 30~50 minutes,
Tempering temperature is 480~520 DEG C, and tempering time is 50~70 minutes.
Further, in the step 4), the deeply molten tack welding parameter of laser are as follows: 2000~2500W of bonding power, welding speed
Spend 2.5~3m/min.
Further, in the step 5), welding parameter optimization soldering test is first carried out on welded specimen prefabricated component and is obtained
Welded specimen is obtained, guarantees that weld seam ray detection is qualified, and back of weld is not more than 0.3 without recess, weld reinforcement, according still further to examination
The welding parameter welded case prefabricated component tested obtains shell；
And Laser Deep Penetration Welding parameter are as follows: backing welding 2500~3500W of bonding power, 0.8~1.2m/min of speed of welding；
Add thread cosmetic welding a 2500~3500W of bonding power, 0.5~0.8m/min of speed of welding.
Further, in the step 6), the parameter of destressing tempering is carried out after welding is qualified are as follows: heating 500~550
DEG C, 60~90min is kept the temperature, furnace cooling is air-cooled to room temperature to coming out of the stove after 300 DEG C.
Compared with prior art, the present invention having the advantage that
1) welding method of the airborne pencil rocket shell of the present invention docks circumferential weld location structure using positioning sleeve, so that shell
Butt welding installation is fast and accurate for positioning, and the time, conventional method installed positioning time greater than 15 minutes less than 2 minutes；It does not need to tear open
Welding mandrel is unloaded, conventional method disassembly is welded mandrel needs 10 minutes or more；Welding method of the invention cannot be only used for small-sized
The efficient welding of storepipe can be used for the efficient welding of other similar products parts；
2) using welding after housing part quenching+tempering, weld strength loss is small, can achieve the 95 of base material matrix strength
~100% (base material matrix 1080~1240MPa of tensile strength, 1026~1180MPa of weld joint samples tensile strength)；Weld seam
Good toughness, 40 ° of flawlesses of bending angle；
3) seam deformation is small, even weld 0.03~0.06mm of shrinkage, and the general shrinkage of traditional welding be 0.5~
1.0mm。
Detailed description of the invention
Fig. 1 is front head schematic diagram of housing structure；
Fig. 2 is cylinder rear joint schematic diagram of housing structure；
Fig. 3 is airborne pencil rocket schematic diagram of housing structure；
Fig. 4 is the left segment structure schematic diagram of butt welding sample；
Fig. 5 is the right segment structure schematic diagram of butt welding sample；
Fig. 6 is welded specimen structural schematic diagram.
Wherein: front head shell 1, cylinder be followed by casing 2, smart car technique collet 3, preceding cylindrical section 4, preceding docking end face 5,
Paracone 8, left section 9 of butt welding sample, right section 10 of butt welding sample at 6, rear docking end face 7, metacone.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The welding method of airborne pencil rocket shell, airborne pencil rocket diameter of the housing is less than 200mm, material is
30CrMnSiA Hi-Stren steel, airborne pencil rocket shell includes front head shell 1 and cylinder is followed by casing 2, welding
Method is as follows:
1) front head shell 1 and cylinder are followed by the processing of casing 2
In conjunction with Fig. 1, Fig. 2 by the roughing of cylindrical body raw material at front head shell 1, the front end of front head shell 1 is equipped with essence
Turner skill collet 3, the rear end of front head shell 1 are equipped with the preceding cylindrical section 4 that 2 butt welding of casing is followed by with cylinder, preceding cylindrical section 4
Rear end face be preceding docking end face 5；
Thick walled steel tube raw material are chosen according to GJB2608A-2008 " aviation structural steel thick-walled seamless steel pipes specification ", are protected
Card cylinder is followed by the maximum outer circle of casing and the unilateral machining allowance for having 1~2mm of minimum inner hole, and round tube raw material are slightly added
Work is followed by casing 2 at cylinder, wherein cylinder is followed by the front end of casing 2 as the rear cylindrical section with preceding cylindrical section butt welding；
Wherein, preceding 4 length L1 of cylindrical section is 5~10mm, by the exhausted big portion of the cylinder segment length of airborne pencil rocket shell
Point being placed on cylinder is followed by casing, has not only guaranteed that docking is good, but also not too long increase raw materials consumption and processing cost；
The preceding docking end face 5 of preceding cylindrical section 4 and the axis verticality error of front head shell 1 are not more than 0.1mm, to guarantee
Assembly precision is good, and welding quality is good；The axis verticality error that docking end face 7 is followed by casing 2 with cylinder afterwards is not more than
0.1mm, to guarantee that assembly precision is good, welding quality is good；
Preceding cylindrical section, rear cylindrical section outer diameter tolerance are D1 (+0.03, -0.03), and wall thickness tolerance is t (+0.05,0)；
Preceding cylindrical section inside and outside wall and end face intersection edges are paracone side 6, to guarantee weld seam good knitting；Afterwards inside and outside cylindrical section
Wall and end face intersection edges are metacone side 8, to guarantee weld seam good knitting；Keeping sharp side is to guarantee that interface does not lack material
Material sufficiently fuses in welding and does not generate excessive defect；
2) left section 9 of butt welding sample and right section 10 of butt welding sample of processing
Heavy wall steel is chosen according to GJB2608A-2008 " aviation structural steel thick-walled seamless steel pipes specification " in conjunction with Fig. 4, Fig. 5
Pipe raw material, guarantee left section 9 of butt welding sample and right section 10 of butt welding sample of maximum outer circle and minimum inner hole it is unilateral have 1~
The machining allowance of 2mm；By the roughing of round tube raw material at left section 9 of butt welding sample and right section 10 of butt welding sample, wherein docking
The wall thickness and size of left section 9 of sample of weldering are identical as preceding cylindrical section 4；Similarly, right section 10 of butt welding sample of wall thickness and size and circle
It is identical that cylinder is followed by casing 2；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, to the docking in step 2)
Left section of sample and right section of progress quenching and tempering of butt welding sample are welded, hardening heat is 890~910 DEG C, and the cool time is
30~50 minutes, tempering temperature was 480~520 DEG C, and tempering time is 50~70 minutes；
4) assembly, tack welding
It will be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, trial assembly is qualified
Opening circumferential on the ring in positioning sleeve clamp carries out laser positioning weldering and obtains shell prefabricated component afterwards, similarly, by step 3)
In left section of butt welding sample and right section of butt welding sample cleaning after is fitted into positioning sleeve clamp, in positioning sleeve after trial assembly qualification
Circumferential opening carries out laser positioning weldering and obtains welded specimen prefabricated component on the ring of fixture；
And the deeply molten tack welding parameter of laser are as follows: 2000~2500W of bonding power, 2.5~3m/min of speed of welding；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
Wherein, welding parameter optimization soldering test is first carried out on welded specimen prefabricated component obtains welded specimen such as Fig. 6 institute
Show, guarantee that weld seam ray detection is qualified, and back of weld is not more than 0.3 without recess, weld reinforcement, obtains according still further to test
Welding parameter welded case prefabricated component obtains shell, as shown in Figure 3；
And Laser Deep Penetration Welding parameter are as follows: backing welding 2500~3500W of bonding power, 0.8~1.2m/min of speed of welding；
Add thread cosmetic welding a 2500~3500W of bonding power, 0.5~0.8m/min of speed of welding；
6) weld radiographic inspection, repair welding, again radiographic inspection
It carries out DR direct digital radiograph system to shell and welded specimen weld seam after welding to detect a flaw, to mention
High detection efficiency and detection sensitivity, shorten detection time, and guarantee carries out stress relief annealing in 8 hours after welding；Then it adopts
Repair welding qualification is carried out to shell butt weld fault location with argon gas protection method for laser welding, and ray spy is carried out to repair welding weld seam
Wound；
7) stress relief annealing
To carrying out stress relief annealing in shell and welded specimen after welding 8 hours.Destressing is carried out after welding is qualified to return
The parameter of fire are as follows: 500~550 DEG C of heating keeps the temperature 60~90min, and furnace cooling is air-cooled to room temperature to coming out of the stove after 300 DEG C.
Embodiment 1
For certain model 30CrMnSiA Hi-Stren steel compact shell, profile diameter D1 is 140mm, and shell is long
Degree L0 is 550mm, and wall thickness t is 2mm, and the welding method of the airborne pencil rocket shell of the present invention is as follows:
1) front head shell and cylinder are followed by the processing of casing
By the roughing of cylindrical body raw material at front head shell, the front end of front head shell is equipped with smart car technique collet, preceding
The rear end of end socket shell is equipped with the preceding cylindrical section that casing butt welding is followed by with cylinder, and the rear end face of preceding cylindrical section is preceding butt end
Face；
Round tube raw material roughing is followed by casing at cylinder, wherein the front end that cylinder is followed by casing is and preceding circle
The rear cylindrical section of cylinder section butt welding；
Wherein, preceding cylinder segment length L1 is 5mm；And the preceding docking end face of preceding cylindrical section is vertical with the axis of front head shell
It spends error and is not more than 0.1mm；Docking end face and cylinder are followed by the axis verticality error of casing no more than 0.1mm afterwards；Preceding circle
Cylinder section, rear cylindrical section outer diameter are unanimously 140mm, and outer diameter tolerance is 140 ± 0.03；Preceding cylindrical section, rear cylindrical section wall thickness be 2mm,
Tolerance is 2 (+0.05,0)；
Preceding cylindrical section inside and outside wall and end face intersection edges are paracone side；After cylindrical section inside and outside wall and end face intersection edges are afterwards
Sharp side；
2) left section and right section of butt welding sample of butt welding sample of processing
By the roughing of round tube raw material at left section and right section of butt welding sample of butt welding sample, wherein butt welding sample is left
The wall thickness and size of section are identical as preceding cylindrical section；Similarly, right section of butt welding sample of wall thickness and size and cylinder are followed by casing
It is identical；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, to the docking in step 2)
Left section of sample and right section of progress quenching and tempering of butt welding sample are welded, hardening heat is 890 DEG C, and the cool time is 50 points
Clock, tempering temperature are 520 DEG C, and tempering time is 50 minutes；
4) assembly, tack welding
It will be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, trial assembly is qualified
Opening circumferential on the ring in positioning sleeve clamp carries out laser positioning weldering and obtains shell prefabricated component afterwards, similarly, by step 3)
In left section of butt welding sample and right section of butt welding sample cleaning after is fitted into positioning sleeve clamp, in positioning sleeve after trial assembly qualification
Circumferential opening carries out laser positioning weldering and obtains welded specimen prefabricated component on the ring of fixture；
And the deeply molten tack welding parameter of laser are as follows: bonding power 2000W, speed of welding 3m/min；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
Wherein, welding parameter optimization soldering test is first carried out on welded specimen prefabricated component and obtains welded specimen, guarantees weldering
It is qualified to stitch ray detection, and back of weld is not more than 0.3 without recess, weld reinforcement, the welding parameter obtained according still further to test
Welded case prefabricated component obtains shell；
And Laser Deep Penetration Welding parameter are as follows: backing welding bonding power 2500W, speed of welding 1.2m/min；Add a cosmetic welding
Bonding power 2500W, speed of welding 0.8m/min；
6) weld radiographic inspection, repair welding, again radiographic inspection
It carries out DR direct digital radiograph system to shell and welded specimen weld seam after welding to detect a flaw, to mention
High detection efficiency and detection sensitivity, shorten detection time, and guarantee carries out stress relief annealing in 8 hours after welding；Then it adopts
Repair welding qualification is carried out to shell butt weld fault location with argon gas protection method for laser welding, and ray spy is carried out to repair welding weld seam
Wound；
7) stress relief annealing
To carrying out stress relief annealing in shell and welded specimen after welding 8 hours.Destressing is carried out after welding is qualified to return
The parameter of fire are as follows: 500 DEG C of heating keeps the temperature 60min, and furnace cooling is air-cooled to room temperature to coming out of the stove after 300 DEG C.
Embodiment 2
For certain model 30CrMnSiA Hi-Stren steel compact shell, profile diameter D1 is 180mm, and shell is long
Degree L0 is 850mm, and wall thickness t is 2.5mm, and the welding method of the airborne pencil rocket shell of the present invention is as follows:
1) front head shell and cylinder are followed by the processing of casing
By the roughing of cylindrical body raw material at front head shell, the front end of front head shell is equipped with smart car technique collet, preceding
The rear end of end socket shell is equipped with the preceding cylindrical section that casing butt welding is followed by with cylinder, and the rear end face of preceding cylindrical section is preceding butt end
Face；
Round tube raw material roughing is followed by casing at cylinder, wherein the front end that cylinder is followed by casing is and preceding circle
The rear cylindrical section of cylinder section butt welding；
Wherein, preceding cylinder segment length L1 is 7mm；And the preceding docking end face of preceding cylindrical section is vertical with the axis of front head shell
It spends error and is not more than 0.1mm；Docking end face and cylinder are followed by the axis verticality error of casing no more than 0.1mm afterwards；Preceding circle
Cylinder section, rear cylindrical section outer diameter are unanimously 180mm, and outer diameter tolerance is 180 ± 0.03；Preceding cylindrical section, rear cylindrical section wall thickness are
2.5mm, tolerance are 2.5 (+0.05,0)；
Preceding cylindrical section inside and outside wall and end face intersection edges are paracone side；After cylindrical section inside and outside wall and end face intersection edges are afterwards
Sharp side；
2) left section and right section of butt welding sample of butt welding sample of processing
By the roughing of round tube raw material at left section and right section of butt welding sample of butt welding sample, wherein butt welding sample is left
The wall thickness and size of section are identical as preceding cylindrical section；Similarly, right section of butt welding sample of wall thickness and size and cylinder are followed by casing
It is identical；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, to the docking in step 2)
Left section of sample and right section of progress quenching and tempering of butt welding sample are welded, hardening heat is 900 DEG C, and the cool time is 40 points
Clock, tempering temperature are 500 DEG C, and tempering time is 60 minutes；
4) assembly, tack welding
It will be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, trial assembly is qualified
Opening circumferential on the ring in positioning sleeve clamp carries out laser positioning weldering and obtains shell prefabricated component afterwards, similarly, by step 3)
In left section of butt welding sample and right section of butt welding sample cleaning after is fitted into positioning sleeve clamp, in positioning sleeve after trial assembly qualification
Circumferential opening carries out laser positioning weldering and obtains welded specimen prefabricated component on the ring of fixture；
And the deeply molten tack welding parameter of laser are as follows: bonding power 2200W, speed of welding 2.7m/min；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
Wherein, welding parameter optimization soldering test is first carried out on welded specimen prefabricated component and obtains welded specimen, guarantees weldering
It is qualified to stitch ray detection, and back of weld is not more than 0.3 without recess, weld reinforcement, the welding parameter obtained according still further to test
Welded case prefabricated component obtains shell；
And Laser Deep Penetration Welding parameter are as follows: backing welding bonding power 3000W, speed of welding 1m/min；Add a cosmetic welding weldering
Meet power 3000W, speed of welding 0.7m/min；
6) weld radiographic inspection, repair welding, again radiographic inspection
It carries out DR direct digital radiograph system to shell and welded specimen weld seam after welding to detect a flaw, to mention
High detection efficiency and detection sensitivity, shorten detection time, and guarantee carries out stress relief annealing in 8 hours after welding；Then it adopts
Repair welding qualification is carried out to shell butt weld fault location with argon gas protection method for laser welding, and ray spy is carried out to repair welding weld seam
Wound；
7) stress relief annealing
To carrying out stress relief annealing in shell and welded specimen after welding 8 hours.Destressing is carried out after welding is qualified to return
The parameter of fire are as follows: 525 DEG C of heating keeps the temperature 80min, and furnace cooling is air-cooled to room temperature to coming out of the stove after 300 DEG C.
Embodiment 3
For certain model 30CrMnSiA Hi-Stren steel compact shell, profile diameter D1 is 220mm, and shell is long
Degree L0 is 1150mm, and wall thickness t is 3mm, and the welding method of the airborne pencil rocket shell of the present invention is as follows:
1) front head shell and cylinder are followed by the processing of casing
By the roughing of cylindrical body raw material at front head shell, the front end of front head shell is equipped with smart car technique collet, preceding
The rear end of end socket shell is equipped with the preceding cylindrical section that casing butt welding is followed by with cylinder, and the rear end face of preceding cylindrical section is preceding butt end
Face；
Round tube raw material roughing is followed by casing at cylinder, wherein the front end that cylinder is followed by casing is and preceding circle
The rear cylindrical section of cylinder section butt welding；
Wherein, preceding cylinder segment length L1 is 10mm；And the axis of the preceding docking end face of preceding cylindrical section and front head shell hangs down
Straight degree error is not more than 0.1mm；Docking end face and cylinder are followed by the axis verticality error of casing no more than 0.1mm afterwards；Before
Cylindrical section, rear cylindrical section outer diameter are unanimously 220mm, and outer diameter tolerance is 220 ± 0.03；Preceding cylindrical section, rear cylindrical section wall thickness are
3mm, tolerance are 3 (+0.05,0)；
Preceding cylindrical section inside and outside wall and end face intersection edges are paracone side；After cylindrical section inside and outside wall and end face intersection edges are afterwards
Sharp side；
2) left section and right section of butt welding sample of butt welding sample of processing
By the roughing of round tube raw material at left section and right section of butt welding sample of butt welding sample, wherein butt welding sample is left
The wall thickness and size of section are identical as preceding cylindrical section；Similarly, right section of butt welding sample of wall thickness and size and cylinder are followed by casing
It is identical；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, to the docking in step 2)
Left section of sample and right section of progress quenching and tempering of butt welding sample are welded, hardening heat is 910 DEG C, and the cool time is 30 points
Clock, tempering temperature are 480 DEG C, and tempering time is 70 minutes；
4) assembly, tack welding
It will be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, trial assembly is qualified
Opening circumferential on the ring in positioning sleeve clamp carries out laser positioning weldering and obtains shell prefabricated component afterwards, similarly, by step 3)
In left section of butt welding sample and right section of butt welding sample cleaning after is fitted into positioning sleeve clamp, in positioning sleeve after trial assembly qualification
Circumferential opening carries out laser positioning weldering and obtains welded specimen prefabricated component on the ring of fixture；
And the deeply molten tack welding parameter of laser are as follows: bonding power 2500W, speed of welding 2.5m/min；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
Wherein, welding parameter optimization soldering test is first carried out on welded specimen prefabricated component and obtains welded specimen, guarantees weldering
It is qualified to stitch ray detection, and back of weld is not more than 0.3 without recess, weld reinforcement, the welding parameter obtained according still further to test
Welded case prefabricated component obtains shell；
And Laser Deep Penetration Welding parameter are as follows: backing welding bonding power 3500W, speed of welding 0.8m/min；Add a cosmetic welding
Bonding power 3500W, speed of welding 0.5m/min；
6) weld radiographic inspection, repair welding, again radiographic inspection
It carries out DR direct digital radiograph system to shell and welded specimen weld seam after welding to detect a flaw, to mention
High detection efficiency and detection sensitivity, shorten detection time, and guarantee carries out stress relief annealing in 8 hours after welding；Then it adopts
Repair welding qualification is carried out to shell butt weld fault location with argon gas protection method for laser welding, and ray spy is carried out to repair welding weld seam
Wound；
7) stress relief annealing
To carrying out stress relief annealing in shell and welded specimen after welding 8 hours.Destressing is carried out after welding is qualified to return
The parameter of fire are as follows: 550 DEG C of heating keeps the temperature 90min, and furnace cooling is air-cooled to room temperature to coming out of the stove after 300 DEG C.
The welding method of the airborne pencil rocket shell of the present invention docks circumferential weld location structure using dedicated positioning sleeve, so that
Shell butt welding installation is fast and accurate for positioning, and the time, conventional method installed positioning time greater than 15 minutes less than 2 minutes；Using
The technological parameter of advanced welding method and optimization, weld strength loss is small after shell quenching+tempering, can achieve base material matrix
The 95~100% of intensity；Welding seam toughness is good, 40 ° of flawlesses of bending angle；Seam deformation is small, and even weld shrinkage is less than
0.06mm。
Claims (9)
1. a kind of welding method of airborne pencil rocket shell, the airborne pencil rocket diameter of the housing is less than 200mm, material is
30CrMnSiA Hi-Stren steel, airborne pencil rocket shell include that front head shell and cylinder are followed by casing, feature
Be: the welding method includes the following steps:
1) front head shell and cylinder are followed by the processing of casing
By the roughing of cylindrical body raw material at front head shell, the front end of front head shell is equipped with smart car technique collet, front head
The rear end of shell is equipped with the preceding cylindrical section that casing butt welding is followed by with cylinder, and the rear end face of preceding cylindrical section is preceding docking end face；
Round tube raw material roughing is followed by casing at cylinder, wherein the front end that cylinder is followed by casing is and preceding cylindrical section
The rear cylindrical section of butt welding；
2) left section and right section of butt welding sample of butt welding sample of processing
By the roughing of round tube raw material at left section and right section of butt welding sample of butt welding sample, wherein left section of butt welding sample
Wall thickness and size are identical as preceding cylindrical section；Similarly, it is identical with cylinder to be followed by casing for right section of butt welding sample of wall thickness and size；
3) quenching and tempering
To in step 1) front head shell and cylinder be followed by casing carry out quenching and tempering, in step 2) butt welding try
Left section of sample and right section of progress quenching and tempering of butt welding sample；
4) assembly, tack welding
To be fitted into after front head shell and cylinder rear joint shell body cleaning in step 3) in positioning sleeve clamp, after trial assembly is qualified
Circumferential opening progress laser positioning weldering acquisition shell prefabricated component similarly will be in step 3) on the ring of positioning sleeve clamp
It is fitted into positioning sleeve clamp after left section and right section of the butt welding sample cleaning of butt welding sample, in positioning sleeve clamp after trial assembly is qualified
Ring on circumferential opening carry out laser positioning weldering and obtain welded specimen prefabricated component；
5) shell prefabricated component and welded specimen prefabricated component butt welding
The sample prefabricated part of shell and shell prefabricated component butt welding are carried out using automatic argon gas protection method for laser welding；
6) weld radiographic inspection, repair welding, again radiographic inspection and stress relief annealing
Shell and welded specimen weld seam detect a flaw after welding, then using argon gas protection method for laser welding to shell
It is qualified that butt weld fault location carries out repair welding, and carries out radiographic inspection to repair welding weld seam；And shell and welded specimen are being welded
After carry out stress relief annealing.
2. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: preceding in the step 1)
Cylinder segment length L1 is 5~10mm.
3. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: preceding in the step 1)
The preceding docking end face of cylindrical section and the axis verticality error of front head shell are not more than 0.1mm；After docking end face and cylinder afterwards
The axis verticality error of joint housing is not more than 0.1mm.
4. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: preceding in the step 1)
Cylindrical section, rear cylindrical section outer diameter tolerance are D1 (+0.03, -0.03), and wall thickness tolerance is t (+0.05,0).
5. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: preceding in the step 1)
Cylindrical section inside and outside wall and end face intersection edges are paracone side, and rear cylindrical section inside and outside wall and end face intersection edges are metacone side.
6. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: in the step 3), quench
Fiery temperature is 890~910 DEG C, and the cool time is 30~50 minutes, and tempering temperature is 480~520 DEG C, and tempering time is equal
It is 50~70 minutes.
7. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: in the step 4), swash
Optical depth melts tack welding parameter are as follows: 2000~2500W of bonding power, 2.5~3m/min of speed of welding.
8. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: in the step 5), first
Welding parameter optimization soldering test is carried out on welded specimen prefabricated component and obtains welded specimen, guarantees that weld seam ray detection is qualified,
And back of weld is not more than 0.3 without recess, weld reinforcement, and the welding parameter welded case prefabricated component obtained according still further to test obtains
Obtain shell；
And Laser Deep Penetration Welding parameter are as follows: backing welding 2500~3500W of bonding power, 0.8~1.2m/min of speed of welding；Add silk
Cosmetic welding 2500~3500W of bonding power, 0.5~0.8m/min of speed of welding.
9. the welding method of airborne pencil rocket shell according to claim 1, it is characterised in that: in the step 6), weldering
Engage the parameter that destressing tempering is carried out after lattice are as follows: 500~550 DEG C of heating keeps the temperature 60~90min, and furnace cooling is to after 300 DEG C
It comes out of the stove air-cooled to room temperature.
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